Magnesium salt of dibrombehenic acid.



STATES PATENT OFFICE.

l'llllL FISCHER, OF BERLIN, GERMANY, ASSI' GNOR TO FARBENFABRIKEN VORll'i. FRIEDR.

BAYER 8: 00., OF ELBERFELD, GERMANY, A CORPORATION OF GERMANY.

MAGNESIUM SALT OF 'DIBROMBEHENIC ACID.

Application filed August 12, 1908.

[0 all whom it may concern:

Be it known that I, EMIL Fisonnn, pro' lessor of chemistry, citizen of the German Empire, residing at Berlin, Kingdom of Prussia, Germany, have invented new and useful Iin )rovements in Magnesium Salts of Dibrombe enic Acid, of which the following is a specification.

I have found that the dibromobehenic acid gives a solid stable, tasteless and odorless magnesium salt, which is a valuable substitute for potassium bromid, an average dose being from 1 to 2 grams.

My new preparation is obtained by con verting the free oibromobehenic acid or its alkaline salts into the magnesium salt. The dibromobehenic acid is prepared by treating eruc-ic acid with 'bromin.

The preparation of the magnesium salt of dibromobehenie acid is carried out as follows:

49.8 parts of dibrombelienic acid are dissolved by shaking at ordinary temperature with so much of a diluted caustic potash solution of about 1/40 normal strength as corresponds to 5.6 parts of KOH. The calculated quantity of a dilute aqueous solution of chlorid of magnesium, namely 10.2 parts, (crystals 6 aq.), is added to the solution, and it is stirred until the colorless tlocculent precipitate has settled. It is filtered oil with suction, pressed, washed with alcohol, mixed up by stirring with cold Specification of Letters Patent.

Patented April 27, 1909.

Serial No. 448,240; -(Sp'ecimens.)

water, filtered oil with suction and subsequently washed with Water untilthe wash- Water is free from chlorin. It is then Washed with alcohol and dried in oa-c'u/o. The ma gnosium salt thus obtained is a white, tasteless and odorless ou'der almost in soluble in Water and a cohol. It has the l formula: ((l H Br Og lilg The yield of the above process is a good one.

Having now described my invention and in what manner the same is to be performed, what I claim as new anddesireto secure by Letters Patent is 7 'l he herein-described magnesium salt oi dibromobehenic acid of the following formula (O,,I-L,O,Br,),Mg obtainable by treating; an alkaline solution of dibromobehenic acid with chlorid of magnesium, which magnesium salt is a White solid body, tasteless,

odorless and almost insoluble in water, in-

soluble in alcohol, soluble in ether and chloroform and which is a valuable substitute for potassium bromid, substantially as hereinbefore described.

In testimonv whereof I have hereunto set my hand in the presence of two subscribing witnesses.-

EMIL FISCHER.

Witnesses:

HENRY HASPER, ART UR Sonnonnnn. 

